.head{width: 1000px;height: 30px;margin: auto;border-bottom: solid 2px #aa0000;text-align: center;line-height: 30px;background-image: url(../img/图层-0.png);}
div a{width: 150px;height: 30px;float: left;color: #323232;}
div a:hover{width: 150px;height: 30px;color: #aa0000;}
